CN115492193A

CN115492193A - Coastal water taking and draining pipeline system and construction method thereof

Info

Publication number: CN115492193A
Application number: CN202211239067.1A
Authority: CN
Inventors: 张颖; 金国龙; 李昀; 王勇; 康靖宇; 邓松; 田吟雪; 符晓赟
Original assignee: China Shipbuilding NDRI Engineering Co Ltd
Current assignee: China Shipbuilding NDRI Engineering Co Ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2022-12-20

Abstract

The invention provides a shore-facing water taking and draining pipeline system and a construction method thereof, wherein the system comprises: the foundation comprises a flat foundation base, a dam bank, a partition wall, filler, an underwater pile foundation, a positioning pile head, a platform beam plate, an abutment, a pipeline and a water taking and discharging head; a base leveling foundation is built on an underwater foundation; the embankment protection cofferdam is built on a flat foundation of the substrate and consists of a plurality of caissons; the partition wall is arranged in the caisson to divide the internal space of the caisson into a plurality of areas, the areas comprise at least one pipeline installation area, and the pipeline installation area forms a through channel which runs through from the land side to the water side by arranging door openings on the partition wall and the caisson wall; filling the filler in the non-pipeline installation area; the platform beam plate is arranged on the underwater pile foundation through the positioning pile head frame, and one side of the platform beam plate is connected with the through passage; a guide way area is formed on the platform beam plate; the pipeline is arranged along the through channel to the guide way area, and a plurality of water taking and discharging heads are connected to the pipeline section under water.

Description

Coastal water taking and draining pipeline system and construction method thereof

Technical Field

The invention relates to the technical field of water taking and draining near banks, in particular to a water taking and draining pipeline system near banks and a construction method thereof.

Background

Many engineering projects such as power plants and water works need to take and drain a large amount of water from water areas in the operation process, so the projects are mostly arranged on the shore near the river and the sea to obtain stable water sources. The water intake pipeline system of the shore of the prior art is generally constructed by adopting a water intake and drainage dike, laying an immersed tube or jacking a pipe and a shield construction method in water bottom soil, and is suitable for the shore area with mild geological section and soft stratum. However, geological regions with steep slope rate and hard geology also exist in the near-river and near-sea shorelines, for example, geological regions of lithoid shorelines exist from south to north in China, and the geological regions are not suitable for the mode of constructing pipelines in the water bottom soil layer in the prior art. From the safety perspective, the geological area is suitable for project main body construction, but is not suitable for construction of drainage structures by adopting conventional methods such as immersed tube, jacking tube or shield, and the like, and the design construction is difficult, and even the project site selection is influenced.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a shore-facing water intake and drainage pipeline system suitable for a region having a steep gradient and a hard geology, and a construction method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a drainage pipeline system for offshore taking, which is characterized by comprising: the foundation comprises a flat foundation base, a bank protection cofferdam, partition walls, fillers, an underwater pile foundation, a positioning pile head, a platform beam plate, a pier, a pipeline and a water taking and discharging head; wherein, the foundation leveling foundation is built on the underwater foundation; the embankment protection cofferdam is built on a flat foundation of the substrate and consists of a plurality of box-type structures arranged side by side; the partition wall is arranged in the box-type structure and divides the internal space of the box-type structure into a plurality of areas, the areas comprise at least one pipeline installation area, and the pipeline installation area forms a through channel which runs through from the land side to the water side by arranging door openings on the partition wall and the wall of the box-type structure; filling materials are filled in a non-pipeline installation area inside the box type structure; the plurality of underwater pile foundations are arranged on the water side in a plurality of rows and inserted into the underwater foundation, the platform beam plate is arranged on the underwater pile foundations through the positioning pile head frame, and one side of the platform beam plate is connected with the through passage; the plurality of abutments are arranged on the platform beam slab in two rows, so that the platform beam slab forms a guide way area between the two rows of abutments; the pipeline sets up along through passage to direction way region, and the end that the pipeline is located the water side is the shutoff tip, and the pipeline is located the terminal open end portion that is of land side, is connected with a plurality of on the pipeline section that the pipeline is located the underwater and gets the drainage head.

Further, in the coastal water taking and draining pipeline system provided by the invention, the system can also have the following characteristics: wherein, the pipeline section of pipeline setting on the platform beam slab carries out spacing fixed through spacing subassembly.

Further, in the coastal water taking and draining pipeline system provided by the invention, the system can also have the following characteristics: wherein, spacing subassembly is including pressing the structure of covering and will pressing the bolt mounting of fixing on the platform beam slab at the both sides border that covers the structure of covering of pipeline surface.

Further, in the coastal water taking and draining pipeline system provided by the invention, the system can also have the following characteristics: the pipeline is composed of a plurality of pipe joints, the pipe joint at the tail end of the water side is a pipe joint with one end plugged, and adjacent pipe joints are connected through flanges and bolts.

Further, in the coastal water taking and draining pipeline system provided by the invention, the system can also have the following characteristics: wherein, the pipeline is correspondingly provided with a sealing water-stopping device at each door opening.

7. The invention provides a construction method of the shore-approaching drainage pipeline system, which is characterized by comprising the following steps of:

step 1, building a base leveling foundation on an underwater foundation, and constructing a leveling upper surface;

step 2, building a dike protection cofferdam on a flat foundation of the substrate, wherein the dike protection cofferdam is composed of a plurality of box-type structures arranged side by side, partition walls are built in the box-type structures for partitioning, door openings are reserved on the partition walls and the box-type structures corresponding to through passages, and the door openings are temporarily blocked;

step 3, filling filler in a non-pipeline installation area inside the box-type structure;

step 4, installing a sealing water-stopping device at the door opening;

step 5, constructing an underwater pile foundation in water, and reserving the installation position of a positioning pile head at the head of the underwater pile foundation;

step 6, prefabricating precast slabs and precast beams for forming the platform beam slab, and completing erection and installation of the platform beam slab in site pouring;

step 7, installing a rear matching device for jacking the pipeline on the land side;

step 8, installing a land side pipeline: the pipeline passes through the door opening step by step, and when the pipeline passes through the near-water door opening, the temporary plugging is broken from the outside underwater;

step 9, installing a water side pipeline: the pipeline is continuously jacked in the water;

and step 10, completing jacking, installing a water taking and discharging head on the pipeline section positioned on the water side, and limiting the pipeline.

Further, the construction method provided by the invention can also have the following characteristics: wherein, the box structure adopts the caisson or accomplishes through the cast-in-place construction of steel sheet pile and steel-pipe pile foundation ditch in aqueous.

Further, the construction method provided by the present invention may further have the following features: wherein, the step 6 of manufacturing the precast slab further comprises the step of performing friction reduction processing on the surface of the precast slab.

Further, the construction method provided by the present invention may further have the following features: and 9, when the water side pipeline is installed, adding a counterweight in the pipeline.

The invention has the following functions and effects:

the offshore water taking and draining pipeline system provided by the invention has the advantages that the immersed tube is not required to be laid in an underwater soil layer, the pipeline section positioned in the underwater part is erected through the underwater pile foundation, the positioning pile head and the platform beam plate, and the limiting is carried out through the abutment and the limiting component, so that the stability of the structure of the pipeline in water is ensured, and the position movement of the pipeline cannot be influenced by water flow scouring. In addition, a stable embankment is constructed on the land side through a base leveling foundation, an embankment protection cofferdam, partition walls and filler, and due to the design of the partition areas of the partition walls, if water seepage conditions exist, the water seepage can be controlled in the partition areas through the partition walls. In addition, the shore-facing water taking and draining pipeline system can also be suitable for regions with softer geology, such as soil layer foundations, sand layer foundations and the like, and has a wide application range.

The invention provides a construction method, which comprises the steps of implementing a concrete structure embankment protection process, an underwater platform process and a multi-channel water stop process, and ensures that a pipeline on a bank side with a large gradient is directly and safely jacked and enters water.

Drawings

FIG. 1 is a schematic elevation view of an on-shore water extraction and drainage pipeline system in an embodiment of the present invention;

FIG. 2 is a schematic plan view of an embodiment of the present invention of an offshore access and drainage pipeline system;

FIG. 3 is a schematic view of an embodiment of the present invention of an ashore water intake and drainage pipeline system corresponding to the cross section B-B in FIG. 1.

FIG. 4 is a schematic view (one) of a construction process of the construction method in the embodiment of the present invention;

fig. 5 is a construction process diagram (ii) of the construction method in the embodiment of the present invention.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following embodiments are specifically described in the technical scheme of the invention with reference to the attached drawings.

< example 1>

Referring to fig. 1 to 3, the present embodiment provides a water intake and drainage pipeline system near shore, which includes: the foundation comprises a foundation leveling foundation 1, a dike protection cofferdam 2, a partition wall 3, a filler 4, an underwater pile foundation 7, a positioning pile head 8, a platform beam plate 9, an abutment 16, a pipeline 12, a water taking and draining head 18, a limiting component 17 and a sealing water-stopping device 6.

The coastal water intake and drainage pipeline system of the embodiment is a water intake structure near the coast, the foundation in the seawater in the embodiment is rock, as shown in fig. 1, 14 in fig. 1 represents a land rock surface, and 15 represents an underwater rock surface. But not limited to this, the system of the invention can also be applied to the water areas near the river and the lake, the foundation is not limited to the rock foundation, and can also be a soil layer foundation, a sand layer foundation and the like.

The foundation leveling foundation 1 is built on an underwater rock surface. The main body of the foundation 1 is a weir body constructed by building materials, and the periphery of the weir body is coffered by steel sheet piles.

The dike protection cofferdam 2 is built on the foundation leveling foundation 1. The embankment cofferdam 2 is formed by a plurality of box-type structures arranged side by side, as shown in fig. 2, and the box-type structures in the embodiment adopt prefabricated caissons. The partition walls 3 are built in the caisson 2a to divide the internal space of the box-type structure into a plurality of areas. The plurality of areas include at least one pipeline installation area, and the pipeline installation area forms a through passage which penetrates from the land side to the water side by opening door openings on the partition wall 3 and the wall of the caisson 2 a. This embodiment is illustrated in fig. 2, in which the middle area of the middle caisson 2a shown in fig. 2 is provided as a through passage. The packing 4 is packed inside the box-like structure in the non-pipe-installation area. In addition, a cover plate structure 19 may be provided on the top of the embankment cofferdam 2.

The underwater pile foundations 7 are arranged on the water side in a plurality of rows and are inserted into underwater rocks. The underwater pile foundation 7 adopts the form that the inside of the steel pipe pile is provided with the concrete pile, and the pile foundation construction and the later durability are ensured. In the embodiment, as shown in fig. 2, the underwater piles 7 are arranged in two rows, but this is not limiting, and in other embodiments, multiple rows may be arranged as required.

Platform beam slab 9 erects on two rows of aquatic pile foundations 7 through location pile head 8, and one side of platform beam slab 9 links to each other with the through passage. The platform beam slab 9 is composed of a plurality of precast beams or precast slabs which are connected with each other through concrete pouring. The precast beams 9b and precast slabs 9a of the platform beam slab 9 are illustrated in fig. 3. A plurality of abutments 16 are arranged on the platform beam plate 9 in two rows in a pouring mode, so that the platform beam plate 9 forms a guide way area between the two rows of abutments 16.

As shown in fig. 1, the pipeline 12 is arranged along the through passage to the guide way region, and one end of the pipeline 12 is located on the land side and one end is located on the water side (sea side in this embodiment). The underwater pipeline section of the pipeline 12 is connected with a plurality of water intake and discharge heads 18 for taking or discharging water from the water body, and the water intake and discharge heads 18 are head pipelines with water intake valves or water discharge valves. The end of the pipe 12 on the water side is a closed end, and the end of the pipe 12 on the land side is an open end. The pipeline 12 is composed of a plurality of pipe joints, the pipe joint at the extreme end of the water side is a pipe joint with one end plugged (as shown in fig. 1, 12 a), and adjacent pipe joints are connected through flanges and bolts. The most terminal pipe joint on the land side is used for connecting with a water supply pipeline or a water discharge pipeline of an offshore water taking project.

The pipe 12 may be a round pipe or a square pipe, as shown in fig. 3, in this embodiment, a square pipe is used.

As shown in fig. 3, the pipeline section of the pipeline 12 arranged on the platform beam plate 9 is limited and fixed by the limiting assembly. The limiting assembly 17 comprises a pressing structure pressing on the surface of the pipeline and bolt fixing pieces fixing two side edges of the pressing structure on the platform beam plate. The press-coated structure may be a plate-shaped press-coated structure such as a metal plate or a concrete precast plate, or a rope-shaped press-coated structure such as a metal rope lock or a nylon rope.

As shown in fig. 1 and fig. 2, a sealing and water-stopping device 6 is correspondingly arranged at each door opening of the pipeline 12, so that a plurality of seals are formed in the whole system, and the sealing and water-stopping device 6 is a sealing ring or a sealing sleeve.

< example 2>

The embodiment provides a construction method of the coastal water taking and draining pipeline system, which comprises the following steps:

step 1: a flat foundation of a foundation is built on the underwater rock surface, and a flat upper surface is constructed.

Step 2: and constructing a dike protection cofferdam on a flat foundation of the foundation, wherein the dike protection cofferdam is formed by a plurality of box-type structures arranged side by side, and the box-type structures are finished by adopting caisson or cast-in-place construction of foundation pits in water through steel sheet piles and steel pipe piles.

Build the partition wall to box structure inside and separate, correspond the through passage on partition wall and the box structure and reserve the door opening, the door opening carries out interim shutoff. The temporary plugging 5 shown in fig. 4 can adopt a plugging plate, a plugging plastic sleeve and the like according to actual conditions.

And step 3: the packing is applied to the non-pipe-mounted area inside the box structure.

And 4, step 4: and a sealing water-stopping device is arranged at the position of the door opening.

And 5: and constructing an underwater pile foundation in water, and reserving the mounting position of the positioning pile head at the head of the underwater pile foundation.

Step 6: and prefabricating a precast slab and a precast beam which form the platform beam slab, and performing antifriction processing on the surface of the precast slab. And (5) finishing the erection and installation of the platform beam plate by casting in situ.

And 7: and a rear matching device for jacking the pipeline is arranged on the land side.

And 8: installing a land side pipeline: referring to fig. 3, the pipeline passes through the door opening step by step, and when passing through the near-water door opening, the temporary plugging is broken from the outside under water.

And step 9: the water side pipe is installed and referring to fig. 4, the pipe continues to be jacked in the water.

In step 9, when the pipeline is not sufficiently anti-floating, a counterweight may be added inside the pipeline, and 13 shown in fig. 5 is a counterweight.

In step 9, when water seeps from the joint of the pipe joint during the installation of the water side pipeline, the water seepage can be controlled in the partitioned area through the partition wall, and then the constructor needs to take measures such as backfilling and reinforcement in time.

Step 10: the jacking is completed, a water taking and discharging head is installed at the pipeline section positioned at the water side, and the pipeline is limited through a limiting assembly.

The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. An offshore access and drainage pipeline system, comprising: the foundation comprises a flat foundation base, a dam bank, a partition wall, filler, an underwater pile foundation, a positioning pile head, a platform beam plate, an abutment, a pipeline and a water taking and discharging head;

wherein the basement leveling foundation is built on an underwater foundation;

the embankment protection cofferdam is built on the flat foundation of the substrate and consists of a plurality of box-type structures arranged side by side;

the partition wall is arranged in the box-type structure and divides the internal space of the box-type structure into a plurality of areas, the areas comprise at least one pipeline installation area, and the pipeline installation area forms a through channel which penetrates from the land side to the water side by arranging door openings on the partition wall and the wall of the box-type structure;

the filler is filled in a non-pipeline installation area inside the box-type structure;

the plurality of underwater pile foundations are arranged on the water side in a plurality of rows and inserted into an underwater foundation, the platform beam plate is erected on the underwater pile foundations through positioning pile heads, and one side of the platform beam plate is connected with the through passage;

the plurality of abutments are arranged on the platform beam plate in two rows, so that a guide way area is formed between the two rows of abutments by the platform beam plate;

the pipeline is followed the through passage extremely the regional setting of direction way, the end that the pipeline is located the water side is the shutoff tip, the pipeline is located the terminal open end portion that is of land side, be connected with a plurality of on the pipeline section that the pipeline is located the underwater the water intaking and discharging head.

2. The ashore water extraction and drainage pipeline system as claimed in claim 1, wherein:

the pipeline section of the pipeline arranged on the platform beam plate is limited and fixed through a limiting assembly.

3. The ashore water extraction and drainage pipeline system as claimed in claim 2, wherein:

the limiting assembly comprises a pressing structure pressing on the surface of the pipeline and bolt fixing pieces fixing two side edges of the pressing structure on the platform beam plate.

4. The ashore water extraction and drainage pipeline system as claimed in claim 1, wherein:

the pipeline is composed of a plurality of pipe joints, the pipe joint at the tail end of the water side is a pipe joint with one end plugged, and adjacent pipe joints are connected through flanges and bolts.

5. The ashore water extraction and drainage pipeline system as claimed in claim 1, wherein:

wherein, the pipeline is correspondingly provided with a sealing water-stopping device at each door opening.

6. The construction method of the ashore water extraction and drainage pipeline system as claimed in any one of claims 1 to 5, comprising the steps of:

step 2, building a dike protection cofferdam on a flat foundation of a substrate, wherein the dike protection cofferdam is composed of a plurality of box-type structures arranged side by side, partition walls are built in the box-type structures for partitioning, door openings are reserved on the partition walls and the box-type structures corresponding to through channels, and the door openings are temporarily blocked;

step 4, installing a sealing water-stopping device at the door opening;

step 5, constructing the underwater pile foundation in water, and reserving the installation position of the positioning pile head at the head of the underwater pile foundation;

step 8, installing a land side pipeline: the pipeline passes through the door opening step by step, and when passing through the near-water door opening, the temporary plugging is broken from the outside underwater;

7. The construction method according to claim 6, wherein:

the box-type structure is completed by adopting a caisson or by cast-in-place construction of a steel sheet pile and a steel pipe pile in a foundation pit in water.

8. The construction method according to claim 6, wherein:

wherein, step 6, when manufacturing the precast slab, the friction reducing processing is carried out on the surface of the precast slab.

9. The construction method according to claim 6, wherein:

and 9, when the water side pipeline is installed, adding a counterweight in the pipeline.